Yeah a 20# tank should hold 4.5 gallons which is 80%. You only fill them to 80 because your actually just burning the fumes off the top. I know Blue Rhino and several of the other exchanges only put 3.5 gallons in the tanks. Some of the refill places also charge you for a full tank even if they only top it off which is insane. We refill tanks at our families gas station in west TN. A 20# tank is $18 plus tax, or $4 per gallon.

I see there is only 15# in the tank. It says right on it (Blue Whino).

I hate to drive all around and spend $10 in gas just to save $2 in propane. There is a refilling place about 5 miles south of me but a kid got killed about 5 years ago refilling propane tanks there. :eek1

Wally World have exchanges? I just called them and they said $17.97 for exchange to they are in the lead so far.

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It seems like a terrible idea to refill tanks in an enclosed space like that. You have to vent some of the excess pressure from the tanks which allows a bit of gas to escape plus you lose a bit more when you remove the nozzle. It would be just the same if you had people filling their gas tanks inside a shed accidents would happen all the time. These things need to be in the open air so that the gas can dissipate. Regardless this is super sad to see. Especially with such a young kid.

Around here it is U-Haul (refill - I do not exchange), 3.99/gallon incl. tax.

My tanks are seldom fully empty, since when I know I'm going to use propane I will usually have the tank filled on my way to/from work when I pass it.

So I'm not sure what a full 20#'er comes to, but I had one empty, one partially empty, and a partly empty 11# tank I use for camping, and all three were filled for ~30 bucks.

I'm not sure if you get 4.5 gallons in an empty 20#, they advertise that they fill them all the way up, but regardless, you only pay for metered volume, and their pump has an inspection stamp same as the gas station.

as of feb. 9, 2015
US Wholesale Propane Price is at a current level of 0.668, up from 0.612 last week and down from 2.705 one year ago. This is a change of 9.15% from last week and -75.30% from one year ago.

those are price per gallon. 20lb tank is antywhere between 3.6 and 4.6 gallons depending on how much the propane company decides to rip you off for. retail propane should be around $1.70 or so a gallon currently. .

so, even though MOST propane places held their prices from last year, they are paying 75% less..